JAX-WS, JAX-RPC, XMLBeans and so on...

To clarify yourself the difference between JAX-RPC and JAX-WS I suggest this article:

http://finallyigotit.blogspot.com/2009/05/jax-rpc-vs-jax-ws.html

For a critical analysis of Web Services and standards,
http://www.predic8.com/axis2-cxf-jax-ws-comparison.htm